Bosch GBH 24 VFR Professional Original Instructions Manual page 22

OBJ_BUCH-372-001.book Page 22 Tuesday, July 24, 2007 1:31 PM
22 | English
Selecting the Tool Holder
For hammer drilling, SDS-plus drilling tools that
can be inserted into the SDS-plus tool holder 1
are required.
For drilling without impact in wood, metal, ce-
ramic and plastic, use non-SDS-plus drilling
tools (e. g. drill bits with cylindrical shank). A
keyless or a key type drill chuck is required for
such drilling tools.
Note: Do not use drilling tools without SDS-plus
for hammer drilling! Drilling tools without SDS-
plus as well as the tool holder are damaged
when used for hammer drilling.
GBH 24 VFR: The SDS-plus tool holder 1 can
easily be exchanged against the keyless replace-
ment chuck 19 provided.
Changing the Tool Holder
Dismounting the SDS-plus Tool Holder or the
Quick change keyless chuck (see figure D)
Pull the lock ring of the tool holder 4 firmly in
the direction of the arrow, hold it in this position
and pull off the tool holder 1 or the keyless re-
placement chuck 19 toward the front.
After removing, protect the tool holder 1 or the
quick change keyless chuck 19 against contami-
nation. Lightly lubricate the engaging grooves, if
required.
Mounting the SDS-plus Tool Holder or the
Quick change keyless chuck
Grasp the tool holder 1 or the keyless replace-
ment chuck 19 completely with your hand. Slide
the tool holder 1 or the keyless replacement
chuck 19 with a turning motion onto the drill
chuck mounting until a distinct latching noice is
heard.
The tool holder 1 or the quick change keyless
chuck 19 is automatically locked. Check the
locking effect by pulling the tool holder.
1 619 929 740 | (24.7.07)
Changing the Key Type Drill Chuck
(GBH 24 VRE) (see figure E)
Mounting the Key Type Drill Chuck
Screw the SDS-plus adapter shank 18 into a key
type drill chuck 17. Secure the key type drill
chuck 17 with the securing screw 16. Please ob-
serve that the securing screw has a left-hand
thread.
Clean the shank end of the adapter shank and
apply a light coat of grease.
Insert the key type drill chuck with the adapter
shank into the tool holder with a turning motion
until it automatically locks.
Check the locking effect by pulling the key type
drill chuck.
Dismounting the Key Type Drill Chuck
Push the locking sleeve 3 toward the rear and
pull out the key type drill chuck 17.
Changing the Tool
With the SDS-plus tool holder, simple and con-
venient tool changing is possible without addi-
tional aids.
As a requirement of the system, the SDS-plus
drilling tool can move freely. This causes a cer-
tain radial run-out at no-load, which has no ef-
fect on the accuracy of the drill hole, as the drill
bit centres itself upon drilling.
The dust protection cap 2 largely prevents the
entry of drilling dust into the tool holder during
operation. When inserting the tool, take care
that the dust protection cap 2 is not damaged.
A damaged dust protection cap should be
changed immediately. We recommend hav-
ing this carried out by an after-sales serv-
ice.
Inserting SDS-plus Drilling Tools (see figure F)
Clean and lightly grease the shank end of the
tool.
Insert the tool in a twisting manner into the tool
holder until it latches itself.
Check the latching by pulling the tool.
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